@ARTICLE {4462,
author={J. J. O.  Pires and L.   Cancela},
doi={10.1109/LPT.2009.2028582},
journal={IEEE Photonics Technology Letters},
title={A contribution to study the effect of multipath coherent crosstalk due to optical network nodes on DPSK signals},
year={2009},
month={October},
volume={21},
number={20},
pages={1499-1501},
ISSN={1041-1135}
}